The only way to know for sure about the magazine length is to measure it. The bigger problem may be that the chamber won't clean up. I haven't done a 7mm08 to 7x57 but I have done 243 to 6mm Rem which is the same parent cases. The new chamber will probably not clean up all traces of the old one unless you set the barrel back.
Posts: 545 | Location: Liberty, MO | Registered: 21 January 2003
quote:Originally posted by TrademarkTexan: Could a Winchester featherweight in 7mm08 be rechambered to 7x57? Would the magazine be long enough for the higher bullet weights?
Also, would any work have to be done for feeding?
My last post probably answered this question since the magazines for 7mm-08s are usually 2.800-2.830", You really aren't entertaining the idea of doing this are you? Just wondering what you want to load in the 7x57 that the 708 can't handle, considering you can push a 175gr. bullet up to 2800fps in the 708, vs 2500fps or so out of a 7x57, something don't add up here, unless you have something else in mind, you can always download the 708 to get the velocity you get from the 7x57 I know, what a smartass Jay
Posts: 1745 | Location: WI. | Registered: 19 May 2003
quote:Originally posted by TrademarkTexan: Not really interested in velocity. Get plenty of that with other things. I think a 7x57 is a classy old round...
To each their own...
Texas, You can't get any classier than a 7mm-08 Jay
Posts: 1745 | Location: WI. | Registered: 19 May 2003
Do you have a chronographed load that pushes a 175 grain bullet at 2,800 fps in the 7-08? Sounds like a load that is either too hot or not verified by a chrono to me.
If you load the 7x57 and 7-08 to the same pressure and use the same bullet, the 7x57 will have a higher velocity due to greater case capacity. You can't over come the basic fact that the 7x57 has more case capacity. Same reason why you can drive a 280 Rem faster than a 7x57.
Posts: 1430 | Location: California | Registered: 21 February 2001
The only way I would rechamber is if the 708's chamber is just out -of- round or something. but in a good action the 7 mauser can be steped up to the same speeds as the 708. Or real close to them.
Posts: 93 | Location: Louisiana | Registered: 12 November 2003
Rechamber a 7mm-08 to 7x57? Why??? There are basically the same cartridge. Just leave well enough alone unless you like spending money.
I think people agonize too much over calibers. Don't worry too much over minor differences; the animal won't know the difference.
Assuming the bullets are the same and have the same velocity, the animal does now know what gun it came from. A 7mm Nosler Partition bullet is the same bullet no matter what gun or cartridge fired it. It does not matter if it came out of 7mm-08 or a 7x57 or a 7mm King Kong Bazooka. If it is the same bullet at the same velocity, it is all the same.
There is no practical, in the field, difference between a 7mm-08 and a 7x57.
Posts: 9 | Location: Texas | Registered: 24 October 2003
The chamber clean up is not worth the effort alone. The amount of set back would be noticeable. I feel you would be better off selling that 7-08 barrel, and locating a 7x57 barrel. I think you will be happier in the long run. Besides, you might want a reason to have both.
Later....
P.S. I do not know the over all length of your mag well.
Do you have a chronographed load that pushes a 175 grain bullet at 2,800 fps in the 7-08? Sounds like a load that is either too hot or not verified by a chrono to me.
If you load the 7x57 and 7-08 to the same pressure and use the same bullet, the 7x57 will have a higher velocity due to greater case capacity. You can't over come the basic fact that the 7x57 has more case capacity. Same reason why you can drive a 280 Rem faster than a 7x57.
Shumba, That was taken out of the Speer #11 manual, 51grs. MRP, 2799fps., was taking the max velocities from both rounds, sure, a more realistic velocity is about 2650, but that's what Speer got for a max velocity from the 708, 24" Remington rifle, Jay
Posts: 1745 | Location: WI. | Registered: 19 May 2003
Shumba, since you seem to have all the numbers, what would the velocity gain be in a 7x57 versus a 7-08? I think you will find it falls within the standard deviation of either cartridge. As I posted elsewhere, the downrange advantage of one over the other is zilch. And that's based on shooting both of them, not on hair-splitting psuedo physics.
Posts: 2037 | Location: frametown west virginia usa | Registered: 14 October 2001
You WILL have to set the barrel back before rechambering! I load my 7X57 ammo to 3.15" O/A. but my magazines are long enough (Mauser, Ruger M77, No. 1A, and the guns have long throats.
quote:My last post probably answered this question since the magazines for 7mm-08s are usually 2.800-2.830", You really aren't entertaining the idea of doing this are you? Just wondering what you want to load in the 7x57 that the 708 can't handle, considering you can push a 175gr. bullet up to 2800fps in the 708, vs 2500fps or so out of a 7x57, something don't add up here, unless you have something else in mind, you can always download the 708 to get the velocity you get from the 7x57 I know, what a smartass Jay
The 7X57 IS NOT A LESS POWERFUL ROUND than the 7mm '08! The relationship is the same as the .243 Win. vs the 6mm Rem.
Because it holds more powder, a 7X57 built on a modern, strong action can be loaded to outperform the 7mm '08 loaded with SAFE LOADS! I have gotten as much as 2877 FPS from a 7X57m in a Ruger M77, but it ruined the case! My standard load uses three grains less powder than the one that blew the primer at 2877, and this load gives 2720 FPS with ten reloads or more possible out of the cases!
I would be surprised if the 7mm/'08 will beat this with safe pressures, and I'm talking about using N205, MRP, or RE22 in it! But, the 7mm/'08 is more efficient, since it will produce velocities equal to the 7X57mm using less powder. if I owned a 7mm/'08, I certainly would not consider making a 7X57mm out of it, nor would I see a need to own a 7X57mm in addition to the 7mm/'08.
To start with you cannot drive the 7-08 at 7x57 velocity, close but no cigar....Like all things the big dog sleeps on the poarch and the larger capacity case of the 7x57 will simply out perform the 7-08...
But not by much, and I wouldn't think you would gain enough to justify such a conversion...
You could go to the .280 Rem and with that gun or even the 7 Mag. with a little magazine, rail, and by setting the barrel back one half turn to allow for the shoulder of the 7-08, if I recall...That would give you a little, but I doubt if a deer would notice...
Stick with the 7-08, its good enough for Govt. work.
Posts: 42190 | Location: Twin Falls, Idaho | Registered: 04 June 2000
![[Confused]](images/icons/confused.gif){kind=icon}
Jay![[Big Grin]](images/icons/grin.gif){kind=icon}
I know, what a smartass 
![[Wink]](images/icons/wink.gif){kind=icon}
Jay![[Roll Eyes]](images/icons/rolleyes.gif){kind=icon}
